Removing engine oil from raw fiberglass

Fitting my Pepto-Pink cowls, some engine preservation oil dripped on the inside of the lower cowl. Must have been more than a drop or two, because at this time the oily patch on the inside of the cowl is about 12" x 5". It feels slightly oily, and fingers or a paper towel rubbed on it pick up a bit of excess oil.

How can I clean this sufficiently to seal the entire cowl per Vans instructions (West epoxy diluted with acetone)?

Thanks!

I would start with acetone.

Jim Berry
RV-10

Spot remover

Ages ago we used heavy duty spot and stain remover like THIS to remove from balsa wood the castor oil residue from model airplane fuel. It works like a charm. I have since used it to remove oil from fiberglass parts prior to painting.

ronschreck said:

Ages ago we used heavy duty spot and stain remover like THIS to remove from balsa wood the castor oil residue from model airplane fuel. It works like a charm.

Click to expand...

Me too, at least on balsa models.

K 2r is the one I have used in the past, works well.